avienc.c 27.4 KB
Newer Older
Fabrice Bellard's avatar
Fabrice Bellard committed
1
/*
2
 * AVI muxer
3
 * Copyright (c) 2000 Fabrice Bellard
Fabrice Bellard's avatar
Fabrice Bellard committed
4
 *
5 6 7
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
8 9
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
Fabrice Bellard's avatar
Fabrice Bellard committed
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
Fabrice Bellard's avatar
Fabrice Bellard committed
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
Fabrice Bellard's avatar
Fabrice Bellard committed
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Fabrice Bellard's avatar
Fabrice Bellard committed
20
 */
21 22 23

//#define DEBUG

Fabrice Bellard's avatar
Fabrice Bellard committed
24
#include "avformat.h"
25
#include "internal.h"
Fabrice Bellard's avatar
Fabrice Bellard committed
26
#include "avi.h"
27
#include "avio_internal.h"
28
#include "riff.h"
29
#include "mpegts.h"
30 31
#include "libavformat/avlanguage.h"
#include "libavutil/avstring.h"
32
#include "libavutil/internal.h"
33
#include "libavutil/intreadwrite.h"
34
#include "libavutil/dict.h"
35
#include "libavutil/avassert.h"
36
#include "libavutil/timestamp.h"
37
#include "libavutil/opt.h"
38 39
#include "libavutil/pixdesc.h"
#include "libavcodec/raw.h"
Fabrice Bellard's avatar
Fabrice Bellard committed
40 41

/*
42
 * TODO:
Fabrice Bellard's avatar
Fabrice Bellard committed
43 44 45
 *  - fill all fields if non streamed (nb_frames for example)
 */

46
typedef struct AVIIentry {
Fabrice Bellard's avatar
Fabrice Bellard committed
47
    unsigned int flags, pos, len;
48 49 50 51 52
} AVIIentry;

#define AVI_INDEX_CLUSTER_SIZE 16384

typedef struct AVIIndex {
53
    int64_t     indx_start;
54
    int64_t     audio_strm_offset;
55 56
    int         entry;
    int         ents_allocated;
57
    int         master_odml_riff_id_base;
58
    AVIIentry** cluster;
Fabrice Bellard's avatar
Fabrice Bellard committed
59 60
} AVIIndex;

61
typedef struct AVIContext {
62
    const AVClass *class;
63
    int64_t riff_start, movi_list, odml_list;
64
    int64_t frames_hdr_all;
65
    int riff_id;
66
    int write_channel_mask;
Fabrice Bellard's avatar
Fabrice Bellard committed
67 68
} AVIContext;

69
typedef struct AVIStream {
70
    int64_t frames_hdr_strm;
71
    int64_t audio_strm_length;
72
    int packet_count;
73
    int entry;
74
    int max_size;
75
    int sample_requested;
76

77 78
    int64_t last_dts;

79
    AVIIndex indexes;
80
} AVIStream;
81

82 83
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt);

84
static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
85 86 87 88 89 90
{
    int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
    int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
    return &idx->cluster[cl][id];
}

91
static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
92
                                  const char *riff_tag, const char *list_tag)
93
{
94
    AVIContext *avi = s->priv_data;
95
    int64_t loff;
96
    int i;
97

98
    avi->riff_id++;
99 100
    for (i = 0; i < s->nb_streams; i++) {
        AVIStream *avist = s->streams[i]->priv_data;
101
        avist->indexes.audio_strm_offset = avist->audio_strm_length;
102 103
        avist->indexes.entry = 0;
    }
104

105
    avi->riff_start = ff_start_tag(pb, "RIFF");
106
    ffio_wfourcc(pb, riff_tag);
107
    loff = ff_start_tag(pb, "LIST");
108
    ffio_wfourcc(pb, list_tag);
109 110 111
    return loff;
}

112
static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
113
{
114 115
    tag[0] = '0' + index / 10;
    tag[1] = '0' + index % 10;
116
    if (type == AVMEDIA_TYPE_VIDEO) {
117 118
        tag[2] = 'd';
        tag[3] = 'c';
119
    } else if (type == AVMEDIA_TYPE_SUBTITLE) {
120 121 122
        // note: this is not an official code
        tag[2] = 's';
        tag[3] = 'b';
123 124 125 126 127 128 129 130
    } else {
        tag[2] = 'w';
        tag[3] = 'b';
    }
    tag[4] = '\0';
    return tag;
}

131
static int avi_write_counters(AVFormatContext *s, int riff_id)
132
{
133
    AVIOContext *pb = s->pb;
134 135
    AVIContext *avi = s->priv_data;
    int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
136
    int64_t file_size;
137
    AVCodecContext *stream;
138

139
    file_size = avio_tell(pb);
140 141
    for (n = 0; n < s->nb_streams; n++) {
        AVIStream *avist = s->streams[n]->priv_data;
142

143
        av_assert0(avist->frames_hdr_strm);
144
        stream = s->streams[n]->codec;
145
        avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
146
        ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
147
        if (au_ssize == 0)
148
            avio_wl32(pb, avist->packet_count);
149
        else
150
            avio_wl32(pb, avist->audio_strm_length / au_ssize);
151
        if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
152
            nb_frames = FFMAX(nb_frames, avist->packet_count);
153
    }
154
    if (riff_id == 1) {
155
        av_assert0(avi->frames_hdr_all);
156
        avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
157
        avio_wl32(pb, nb_frames);
158
    }
159
    avio_seek(pb, file_size, SEEK_SET);
160 161 162 163

    return 0;
}

164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
static void write_odml_master(AVFormatContext *s, int stream_index)
{
    AVIOContext *pb = s->pb;
    AVStream *st = s->streams[stream_index];
    AVCodecContext *enc = st->codec;
    AVIStream *avist = st->priv_data;
    unsigned char tag[5];
    int j;

    /* Starting to lay out AVI OpenDML master index.
        * We want to make it JUNK entry for now, since we'd
        * like to get away without making AVI an OpenDML one
        * for compatibility reasons. */
    avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
    avio_wl16(pb, 4);   /* wLongsPerEntry */
    avio_w8(pb, 0);     /* bIndexSubType (0 == frame index) */
    avio_w8(pb, 0);     /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
    avio_wl32(pb, 0);   /* nEntriesInUse (will fill out later on) */
    ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
                        /* dwChunkId */
    avio_wl64(pb, 0);   /* dwReserved[3] */
185
    avio_wl32(pb, 0);   /* Must be 0.    */
186 187 188 189 190
    for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
        avio_wl64(pb, 0);
    ff_end_tag(pb, avist->indexes.indx_start);
}

Fabrice Bellard's avatar
Fabrice Bellard committed
191 192
static int avi_write_header(AVFormatContext *s)
{
Fabrice Bellard's avatar
Fabrice Bellard committed
193
    AVIContext *avi = s->priv_data;
194
    AVIOContext *pb = s->pb;
195
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
196
    AVCodecContext *video_enc;
197
    AVStream *video_st = NULL;
198
    int64_t list1, list2, strh, strf;
199
    AVDictionaryEntry *t = NULL;
200
    int padding;
Fabrice Bellard's avatar
Fabrice Bellard committed
201

202 203 204
    if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
        av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
               AVI_MAX_STREAM_COUNT);
205
        return AVERROR(EINVAL);
206 207
    }

208 209 210
    for (n = 0; n < s->nb_streams; n++) {
        s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
        if (!s->streams[n]->priv_data)
211 212 213
            return AVERROR(ENOMEM);
    }

Fabrice Bellard's avatar
Fabrice Bellard committed
214
    /* header list */
215
    avi->riff_id = 0;
216
    list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
Fabrice Bellard's avatar
Fabrice Bellard committed
217 218

    /* avi header */
219
    ffio_wfourcc(pb, "avih");
220
    avio_wl32(pb, 14 * 4);
Fabrice Bellard's avatar
Fabrice Bellard committed
221 222 223
    bitrate = 0;

    video_enc = NULL;
224
    for (n = 0; n < s->nb_streams; n++) {
225 226
        AVCodecContext *codec = s->streams[n]->codec;
        bitrate += codec->bit_rate;
227
        if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
228
            video_enc = codec;
229 230
            video_st = s->streams[n];
        }
Fabrice Bellard's avatar
Fabrice Bellard committed
231
    }
232

Fabrice Bellard's avatar
Fabrice Bellard committed
233 234
    nb_frames = 0;

235 236 237 238
    // TODO: should be avg_frame_rate
    if (video_st)
        avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
                                  video_st->time_base.den));
239
    else
240 241 242
        avio_wl32(pb, 0);
    avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
    avio_wl32(pb, 0); /* padding */
243
    if (!pb->seekable)
244
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED);  /* flags */
245
    else
246
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED);  /* flags */
247
    avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
248 249 250 251
    avio_wl32(pb, nb_frames); /* nb frames, filled later */
    avio_wl32(pb, 0); /* initial frame */
    avio_wl32(pb, s->nb_streams); /* nb streams */
    avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
252
    if (video_enc) {
253 254
        avio_wl32(pb, video_enc->width);
        avio_wl32(pb, video_enc->height);
255
    } else {
256 257
        avio_wl32(pb, 0);
        avio_wl32(pb, 0);
258
    }
259 260 261 262
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */
    avio_wl32(pb, 0); /* reserved */
263

Fabrice Bellard's avatar
Fabrice Bellard committed
264
    /* stream list */
265
    for (i = 0; i < n; i++) {
266 267 268
        AVStream *st = s->streams[i];
        AVCodecContext *enc = st->codec;
        AVIStream *avist = st->priv_data;
269
        list2 = ff_start_tag(pb, "LIST");
270
        ffio_wfourcc(pb, "strl");
271

Fabrice Bellard's avatar
Fabrice Bellard committed
272
        /* stream generic header */
273
        strh = ff_start_tag(pb, "strh");
274
        switch (enc->codec_type) {
275
        case AVMEDIA_TYPE_SUBTITLE:
276 277
            // XSUB subtitles behave like video tracks, other subtitles
            // are not (yet) supported.
278
            if (enc->codec_id != AV_CODEC_ID_XSUB) {
279 280
                av_log(s, AV_LOG_ERROR,
                       "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
281 282
                return AVERROR_PATCHWELCOME;
            }
283 284 285 286 287 288 289 290 291 292 293 294
        case AVMEDIA_TYPE_VIDEO:
            ffio_wfourcc(pb, "vids");
            break;
        case AVMEDIA_TYPE_AUDIO:
            ffio_wfourcc(pb, "auds");
            break;
//      case AVMEDIA_TYPE_TEXT:
//          ffio_wfourcc(pb, "txts");
//          break;
        case AVMEDIA_TYPE_DATA:
            ffio_wfourcc(pb, "dats");
            break;
Fabrice Bellard's avatar
Fabrice Bellard committed
295
        }
296 297 298
        if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
            enc->codec_id == AV_CODEC_ID_XSUB)
            avio_wl32(pb, enc->codec_tag);
299
        else
300 301 302 303 304
            avio_wl32(pb, 1);
        avio_wl32(pb, 0); /* flags */
        avio_wl16(pb, 0); /* priority */
        avio_wl16(pb, 0); /* language */
        avio_wl32(pb, 0); /* initial frame */
305

306
        ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
307

308 309
        if (   enc->codec_type == AVMEDIA_TYPE_VIDEO
            && enc->codec_id != AV_CODEC_ID_XSUB
310 311 312 313
            && au_byterate > 1000LL*au_scale) {
            au_byterate = 600;
            au_scale    = 1;
        }
314 315
        avpriv_set_pts_info(st, 64, au_scale, au_byterate);
        if (enc->codec_id == AV_CODEC_ID_XSUB)
316 317
            au_scale = au_byterate = 0;

318 319
        avio_wl32(pb, au_scale); /* scale */
        avio_wl32(pb, au_byterate); /* rate */
320

321
        avio_wl32(pb, 0); /* start */
322 323
        /* remember this offset to fill later */
        avist->frames_hdr_strm = avio_tell(pb);
324
        if (!pb->seekable)
325 326
            /* FIXME: this may be broken, but who cares */
            avio_wl32(pb, AVI_MAX_RIFF_SIZE);
327
        else
328
            avio_wl32(pb, 0);  /* length, XXX: filled later */
329

330
        /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
331
        if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
332
            avio_wl32(pb, 1024 * 1024);
333
        else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
334
            avio_wl32(pb, 12 * 1024);
335
        else
336 337 338 339
            avio_wl32(pb, 0);
        avio_wl32(pb, -1); /* quality */
        avio_wl32(pb, au_ssize); /* sample size */
        avio_wl32(pb, 0);
340 341
        avio_wl16(pb, enc->width);
        avio_wl16(pb, enc->height);
342
        ff_end_tag(pb, strh);
Fabrice Bellard's avatar
Fabrice Bellard committed
343

344
        if (enc->codec_type != AVMEDIA_TYPE_DATA) {
345
            int ret, flags;
346
            enum AVPixelFormat pix_fmt;
347

348
            strf = ff_start_tag(pb, "strf");
349
            switch (enc->codec_type) {
350 351 352
            case AVMEDIA_TYPE_SUBTITLE:
                /* XSUB subtitles behave like video tracks, other subtitles
                 * are not (yet) supported. */
353
                if (enc->codec_id != AV_CODEC_ID_XSUB)
354 355
                    break;
            case AVMEDIA_TYPE_VIDEO:
356
                /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
357 358 359 360 361 362
                if (  !enc->codec_tag
                    && enc->codec_id == AV_CODEC_ID_RAWVIDEO
                    && enc->pix_fmt == AV_PIX_FMT_RGB555LE
                    && enc->bits_per_coded_sample == 15)
                    enc->bits_per_coded_sample = 16;
                ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
363
                pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
364 365 366 367 368
                                              enc->bits_per_coded_sample);
                if (   !enc->codec_tag
                    && enc->codec_id == AV_CODEC_ID_RAWVIDEO
                    && enc->pix_fmt != pix_fmt
                    && enc->pix_fmt != AV_PIX_FMT_NONE)
369
                    av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
370
                          av_get_pix_fmt_name(enc->pix_fmt));
371 372
                break;
            case AVMEDIA_TYPE_AUDIO:
373 374
                flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
                if ((ret = ff_put_wav_header(pb, enc, flags)) < 0)
375
                    return ret;
376 377
                break;
            default:
378 379
                av_log(s, AV_LOG_ERROR,
                    "Invalid or not supported codec type '%s' found in the input\n",
380
                    (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
381
                return AVERROR(EINVAL);
382
            }
383
            ff_end_tag(pb, strf);
384
            if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
385 386 387
                ff_riff_write_info_tag(s->pb, "strn", t->value);
                t = NULL;
            }
388
            if (enc->codec_id == AV_CODEC_ID_XSUB
389 390 391 392 393
            && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
                const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
                t = NULL;
                if (langstr) {
                    char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
394 395
                    if (!str)
                        return AVERROR(ENOMEM);
396 397 398
                    ff_riff_write_info_tag(s->pb, "strn", str);
                    av_free(str);
                }
399 400
            }
        }
401

402
        if (pb->seekable) {
403
            write_odml_master(s, i);
404
        }
405

406 407 408
        if (enc->codec_type == AVMEDIA_TYPE_VIDEO   &&
            st->sample_aspect_ratio.num > 0 &&
            st->sample_aspect_ratio.den > 0) {
409
            int vprp       = ff_start_tag(pb, "vprp");
410 411 412
            AVRational dar = av_mul_q(st->sample_aspect_ratio,
                                      (AVRational) { enc->width,
                                                     enc->height });
413 414 415
            int num, den;
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);

416 417
            avio_wl32(pb, 0); // video format   = unknown
            avio_wl32(pb, 0); // video standard = unknown
418
            // TODO: should be avg_frame_rate
419
            avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
420 421
            avio_wl32(pb, enc->width);
            avio_wl32(pb, enc->height);
422 423
            avio_wl16(pb, den);
            avio_wl16(pb, num);
424 425
            avio_wl32(pb, enc->width);
            avio_wl32(pb, enc->height);
426
            avio_wl32(pb, 1); // progressive FIXME
427

428 429 430 431
            avio_wl32(pb, enc->height);
            avio_wl32(pb, enc->width);
            avio_wl32(pb, enc->height);
            avio_wl32(pb, enc->width);
432 433 434 435 436
            avio_wl32(pb, 0);
            avio_wl32(pb, 0);

            avio_wl32(pb, 0);
            avio_wl32(pb, 0);
437
            ff_end_tag(pb, vprp);
438 439
        }

440
        ff_end_tag(pb, list2);
Fabrice Bellard's avatar
Fabrice Bellard committed
441
    }
442

443
    if (pb->seekable) {
444
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
445
        avi->odml_list = ff_start_tag(pb, "JUNK");
446 447
        ffio_wfourcc(pb, "odml");
        ffio_wfourcc(pb, "dmlh");
448
        avio_wl32(pb, 248);
449 450
        for (i = 0; i < 248; i += 4)
            avio_wl32(pb, 0);
451
        ff_end_tag(pb, avi->odml_list);
452
    }
Fabrice Bellard's avatar
Fabrice Bellard committed
453

454
    ff_end_tag(pb, list1);
455

456
    ff_riff_write_info(s);
457

458 459 460 461 462

    padding = s->metadata_header_padding;
    if (padding < 0)
        padding = 1016;

463
    /* some padding for easier tag editing */
464
    if (padding) {
465 466 467 468
        list2 = ff_start_tag(pb, "JUNK");
        for (i = padding; i > 0; i -= 4)
            avio_wl32(pb, 0);
        ff_end_tag(pb, list2);
469
    }
470

471
    avi->movi_list = ff_start_tag(pb, "LIST");
472
    ffio_wfourcc(pb, "movi");
Fabrice Bellard's avatar
Fabrice Bellard committed
473

474
    avio_flush(pb);
Fabrice Bellard's avatar
Fabrice Bellard committed
475 476 477 478

    return 0;
}

479
static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
480 481 482 483 484 485 486 487 488 489 490 491 492 493
{
    AVIOContext *pb = s->pb;
    AVIContext *avi = s->priv_data;
    AVIStream *avist = s->streams[stream_index]->priv_data;
    int64_t pos;
    int au_byterate, au_ssize, au_scale;

    avio_flush(pb);
    pos = avio_tell(pb);

    /* Updating one entry in the AVI OpenDML master index */
    avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
    ffio_wfourcc(pb, "indx");             /* enabling this entry */
    avio_skip(pb, 8);
494 495
    avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base);          /* nEntriesInUse */
    avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
496
    avio_wl64(pb, ix);                    /* qwOffset */
497
    avio_wl32(pb, size);                  /* dwSize */
498 499 500 501 502 503 504 505 506 507 508 509 510 511
    ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
    if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
        uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
        if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
            avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
            avist->sample_requested = 1;
        }
        avio_wl32(pb, audio_segm_size / au_ssize);  /* dwDuration (sample count) */
    } else
        avio_wl32(pb, avist->indexes.entry);  /* dwDuration (packet count) */

    avio_seek(pb, pos, SEEK_SET);
}

512 513
static int avi_write_ix(AVFormatContext *s)
{
514
    AVIOContext *pb = s->pb;
515
    AVIContext *avi = s->priv_data;
516 517
    char tag[5];
    char ix_tag[] = "ix00";
518
    int i, j;
519

520
    av_assert0(pb->seekable);
521

522 523 524 525 526 527 528 529 530 531 532 533 534
    for (i = 0; i < s->nb_streams; i++) {
        AVIStream *avist = s->streams[i]->priv_data;
        if (avi->riff_id - avist->indexes.master_odml_riff_id_base == AVI_MASTER_INDEX_SIZE) {
            int64_t pos;
            int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;

            pos = avio_tell(pb);
            update_odml_entry(s, i, pos, size);
            write_odml_master(s, i);
            av_assert1(avio_tell(pb) - pos == size);
            avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
        }
        av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < AVI_MASTER_INDEX_SIZE);
535
    }
536

537 538
    for (i = 0; i < s->nb_streams; i++) {
        AVIStream *avist = s->streams[i]->priv_data;
539
        int64_t ix;
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561

        avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
        ix_tag[3] = '0' + i;

        /* Writing AVI OpenDML leaf index chunk */
        ix = avio_tell(pb);
        ffio_wfourcc(pb, ix_tag);      /* ix?? */
        avio_wl32(pb, avist->indexes.entry * 8 + 24);
        /* chunk size */
        avio_wl16(pb, 2);           /* wLongsPerEntry */
        avio_w8(pb, 0);             /* bIndexSubType (0 == frame index) */
        avio_w8(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
        avio_wl32(pb, avist->indexes.entry);
        /* nEntriesInUse */
        ffio_wfourcc(pb, tag);         /* dwChunkId */
        avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
        avio_wl32(pb, 0);              /* dwReserved_3 (must be 0) */

        for (j = 0; j < avist->indexes.entry; j++) {
            AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
            avio_wl32(pb, ie->pos + 8);
            avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
562
                          (ie->flags & 0x10 ? 0 : 0x80000000));
563 564
        }

565
        update_odml_entry(s, i, ix, avio_tell(pb) - ix);
566 567 568 569 570
    }
    return 0;
}

static int avi_write_idx1(AVFormatContext *s)
571
{
572
    AVIOContext *pb = s->pb;
573
    AVIContext *avi = s->priv_data;
574
    int64_t idx_chunk;
575
    int i;
576
    char tag[5];
577

578
    if (pb->seekable) {
579
        AVIStream *avist;
580
        AVIIentry *ie = 0, *tie;
581 582
        int empty, stream_id = -1;

583
        idx_chunk = ff_start_tag(pb, "idx1");
584 585 586
        for (i = 0; i < s->nb_streams; i++) {
            avist        = s->streams[i]->priv_data;
            avist->entry = 0;
587 588
        }

589 590
        do {
            empty = 1;
591 592 593 594 595 596 597 598 599 600 601
            for (i = 0; i < s->nb_streams; i++) {
                avist = s->streams[i]->priv_data;
                if (avist->indexes.entry <= avist->entry)
                    continue;

                tie = avi_get_ientry(&avist->indexes, avist->entry);
                if (empty || tie->pos < ie->pos) {
                    ie        = tie;
                    stream_id = i;
                }
                empty = 0;
602 603
            }
            if (!empty) {
604
                avist = s->streams[stream_id]->priv_data;
605
                avi_stream2fourcc(tag, stream_id,
606
                                  s->streams[stream_id]->codec->codec_type);
607
                ffio_wfourcc(pb, tag);
608 609 610
                avio_wl32(pb, ie->flags);
                avio_wl32(pb, ie->pos);
                avio_wl32(pb, ie->len);
611
                avist->entry++;
612 613
            }
        } while (!empty);
614
        ff_end_tag(pb, idx_chunk);
615

616
        avi_write_counters(s, avi->riff_id);
617 618 619 620
    }
    return 0;
}

621 622 623 624 625
static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
{
    AVIStream *avist    = s->streams[stream_index]->priv_data;
    AVCodecContext *enc = s->streams[stream_index]->codec;

626
    ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
627 628 629 630 631 632 633 634 635 636 637 638 639 640
    while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
           dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
        AVPacket empty_packet;

        if (dts - avist->packet_count > 60000) {
            av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
            return AVERROR(EINVAL);
        }

        av_init_packet(&empty_packet);
        empty_packet.size         = 0;
        empty_packet.data         = NULL;
        empty_packet.stream_index = stream_index;
        avi_write_packet(s, &empty_packet);
641
        ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
642 643 644 645 646
    }

    return 0;
}

647
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
Fabrice Bellard's avatar
Fabrice Bellard committed
648 649
{
    unsigned char tag[5];
650 651 652 653 654 655 656
    unsigned int flags = 0;
    const int stream_index = pkt->stream_index;
    int size               = pkt->size;
    AVIContext *avi     = s->priv_data;
    AVIOContext *pb     = s->pb;
    AVIStream *avist    = s->streams[stream_index]->priv_data;
    AVCodecContext *enc = s->streams[stream_index]->codec;
657
    int ret;
658

659
    if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
660
        ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
661 662 663
        if (ret < 0)
            return ret;
    }
664

665 666
    if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
        return ret;
667

668 669 670
    if (pkt->dts != AV_NOPTS_VALUE)
        avist->last_dts = pkt->dts + pkt->duration;

671
    avist->packet_count++;
672

673
    // Make sure to put an OpenDML chunk when the file size exceeds the limits
674
    if (pb->seekable &&
675
        (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
676
        avi_write_ix(s);
677
        ff_end_tag(pb, avi->movi_list);
678

679 680
        if (avi->riff_id == 1)
            avi_write_idx1(s);
681

682
        ff_end_tag(pb, avi->riff_start);
683
        avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
684
    }
685

686
    avi_stream2fourcc(tag, stream_index, enc->codec_type);
687
    if (pkt->flags & AV_PKT_FLAG_KEY)
688
        flags = 0x10;
689 690
    if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
        avist->audio_strm_length += size;
Fabrice Bellard's avatar
Fabrice Bellard committed
691

692
    if (s->pb->seekable) {
693
        AVIIndex *idx = &avist->indexes;
694 695
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
696
        if (idx->ents_allocated <= idx->entry) {
697
            idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
698
            if (!idx->cluster) {
699
                idx->ents_allocated = 0;
700
                idx->entry          = 0;
701
                return AVERROR(ENOMEM);
702
            }
703 704
            idx->cluster[cl] =
                av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
705
            if (!idx->cluster[cl])
706
                return AVERROR(ENOMEM);
707 708
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
        }
709

710
        idx->cluster[cl][id].flags = flags;
711 712
        idx->cluster[cl][id].pos   = avio_tell(pb) - avi->movi_list;
        idx->cluster[cl][id].len   = size;
713
        avist->max_size = FFMAX(avist->max_size, size);
714
        idx->entry++;
Fabrice Bellard's avatar
Fabrice Bellard committed
715
    }
716

717 718 719
    avio_write(pb, tag, 4);
    avio_wl32(pb, size);
    avio_write(pb, pkt->data, size);
Fabrice Bellard's avatar
Fabrice Bellard committed
720
    if (size & 1)
721
        avio_w8(pb, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
722 723 724 725 726 727 728

    return 0;
}

static int avi_write_trailer(AVFormatContext *s)
{
    AVIContext *avi = s->priv_data;
729
    AVIOContext *pb = s->pb;
730
    int res = 0;
731
    int i, j, n, nb_frames;
732
    int64_t file_size;
733

734 735 736 737 738
    for (i = 0; i < s->nb_streams; i++) {
        AVIStream *avist = s->streams[i]->priv_data;
        write_skip_frames(s, i, avist->last_dts);
    }

739
    if (pb->seekable) {
740
        if (avi->riff_id == 1) {
741
            ff_end_tag(pb, avi->movi_list);
742
            res = avi_write_idx1(s);
743
            ff_end_tag(pb, avi->riff_start);
744 745
        } else {
            avi_write_ix(s);
746 747
            ff_end_tag(pb, avi->movi_list);
            ff_end_tag(pb, avi->riff_start);
748

749
            file_size = avio_tell(pb);
750
            avio_seek(pb, avi->odml_list - 8, SEEK_SET);
751
            ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
752
            avio_skip(pb, 16);
753

754
            for (n = nb_frames = 0; n < s->nb_streams; n++) {
755
                AVCodecContext *stream = s->streams[n]->codec;
756
                AVIStream *avist       = s->streams[n]->priv_data;
757

758
                if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
759 760
                    if (nb_frames < avist->packet_count)
                        nb_frames = avist->packet_count;
761
                } else {
762 763
                    if (stream->codec_id == AV_CODEC_ID_MP2 ||
                        stream->codec_id == AV_CODEC_ID_MP3)
764
                        nb_frames += avist->packet_count;
765 766
                }
            }
767
            avio_wl32(pb, nb_frames);
768
            avio_seek(pb, file_size, SEEK_SET);
769

770 771
            avi_write_counters(s, avi->riff_id);
        }
772
    }
773

774 775 776
    for (i = 0; i < s->nb_streams; i++) {
        AVIStream *avist = s->streams[i]->priv_data;
        for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
777
            av_freep(&avist->indexes.cluster[j]);
778 779
        av_freep(&avist->indexes.cluster);
        avist->indexes.ents_allocated = avist->indexes.entry = 0;
780 781 782 783
        if (pb->seekable) {
            avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
            avio_wl32(pb, avist->max_size);
        }
784
    }
785

786
    return res;
Fabrice Bellard's avatar
Fabrice Bellard committed
787 788
}

789 790 791 792 793 794 795 796 797 798 799 800 801 802
#define OFFSET(x) offsetof(AVIContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
    { NULL },
};

static const AVClass avi_muxer_class = {
    .class_name = "AVI muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

803
AVOutputFormat ff_avi_muxer = {
804 805 806 807 808 809 810 811 812 813 814
    .name           = "avi",
    .long_name      = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
    .mime_type      = "video/x-msvideo",
    .extensions     = "avi",
    .priv_data_size = sizeof(AVIContext),
    .audio_codec    = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
    .video_codec    = AV_CODEC_ID_MPEG4,
    .write_header   = avi_write_header,
    .write_packet   = avi_write_packet,
    .write_trailer  = avi_write_trailer,
    .codec_tag      = (const AVCodecTag * const []) {
815 816
        ff_codec_bmp_tags, ff_codec_wav_tags, 0
    },
817
    .priv_class     = &avi_muxer_class,
Fabrice Bellard's avatar
Fabrice Bellard committed
818
};